Revert 121031 - Eliminate DownloadProgressUpdated.

content/browser/download/download_manager_impl.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 
 #ifndef CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_MANAGER_IMPL_H_
 #define CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_MANAGER_IMPL_H_
 #pragma once
 
 #include <map>
@@ skipping 140 matching lines @@
 
   // Retrieves the download from the |download_id|.
   // Returns NULL if the download is not active.
   virtual content::DownloadItem* GetActiveDownload(int32 download_id) OVERRIDE;
 
   // Removes |download| from the active and in progress maps.
   // Called when the download is cancelled or has an error.
   // Does nothing if the download is not in the history DB.
   void RemoveFromActiveList(content::DownloadItem* download);
 
+  // Updates the delegate about the overall download progress.
+  void UpdateDownloadProgress();
+
   // Inform observers that the model has changed.
   void NotifyModelChanged();
 
   // Debugging routine to confirm relationship between below
   // containers; no-op if NDEBUG.
   void AssertContainersConsistent() const;
 
   // Add a DownloadItem to history_downloads_.
   void AddDownloadItemToHistory(content::DownloadItem* item, int64 db_handle);
 
@@ skipping 73 matching lines @@
   content::DownloadManagerDelegate* delegate_;
 
   // TODO(rdsmith): Remove when http://crbug.com/85408 is fixed.
   // For debugging only.
   int64 largest_db_handle_in_history_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadManagerImpl);
 };
 
 #endif  // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_MANAGER_IMPL_H_